Rostock 2019 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: New Developments and Techniques
MS 7.2: Vortrag
Mittwoch, 13. März 2019, 15:15–15:30, U A-Esch 2
A new gas-jet setup for laser spectroscopy of superheavy elements — •Steven Nothhelfer1,3, Michael Block1,2,3, Rafael Ferrer4, Tobias Kron2,3, Sebastian Raeder2,3, Fabian Schneider1,3, Piet Van Duppen4, and Elise Verstraelen4 — 1Institut für Kernchemie, Johannes Gutenberg-Universität, Mainz, DE — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, DE — 3Helmholtz-Institut Mainz, DE — 4Instituut voor Kern- en Stralingsfysica, KU Leuven, Leuven, Belgium
Experimental data on the hyperfine structure in superheavy elements (SHE) is important to obtain valuable information about their nuclear structure. In addition, the atomic properties of SHE are of special interest because they are difficult to predict by theoretical calculations due to complex relativistic effects. Therefore, a new gas-jet experiment is being developed, which aims to enable precise investigation of electronic states of rare atoms with the use of laser spectroscopy in a supersonic gas-jet. The study of SHE is realized by stopping fusion evaporation residues in a buffer gas cell after their production and separation at SHIP at GSI, Darmstadt. Subsequently, the fusion evaporation residues are transferred into a supersonic gas-jet, which is produced by a de Laval-nozzle. Laser spectroscopy in this jet enables a higher resolution compared to the previous RADRIS setup, resulting in spectral linewidths of few hundred MHz, granting access to valuable information on nuclear moments and spins which can be derived from the hyperfine structure and isotope shifts. This talk will summarize the current status of the experiment.